Pipe extension



FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side elevational view of the present invention, as taken from the left side in FIG. 1;

FIG. 3 is a side elevational view, as taken from the unseen side in FIG. 1;

FIG. 4 is an end elevational view, as taken from the right in FIG. 1;

FIG. 5 is an end elevational view, as taken from the unseen end in FIG. 1;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a pipe extension, as shown and described. 